To Activate office fisrt enter your product key, download and install office for windows and mac PC.Cheack stesp to activate office versions
Selection your version to Activate office
Activate MS office 365, 2019, 2016, and 2013
When you start an Office app that's not activated, you'll be prompted to sign in to Office. Be sure to sign in using the MS account, or work or school account, that you used to buy or subscribe to Office.
If the Activation wizard appears, Office needs your help to activate. Follow the prompts in the wizard to activate Office.
Activate Office that's pre-installed on a new Windows 10 device
o use Office on your new device, you can activate Office as a 1-month trial of MS office 365 Home. You can also buy Office, add Office to an existing MS office 365 subscription, or enter a product key from a new product key card. If you have an older copy of Office, you can install that instead.
Activate Office HUP
If you bought Office through your employer's MS HUP benefit, select I don't want to sign in or create an account (at the bottom of the screen) and enter your product key.
Activate a brand new Office product key
If you bought a new Office product key card, or you received a product key when you bought Office through an online store, go to Office.com/setup and follow the on-screen prompts. This is a one-time process that adds your new Office product to your MS account. After you redeem your key, you can install Office